x402 Chain Intel – Mempool Sandwich Detector

Use this endpoint when you need real-time or near-real-time sandwich attack detection for specific transactions or tokens in the Ethereum mempool, especially for trading bots that need to protect swaps from MEV exploitation or conduct post-trade forensics on suspicious price impact.

• Transaction hash not found in mempool or already confirmed — returns empty result or 404
• Invalid transaction hash format — returns 400 validation error
• Mempool data unavailable due to node connectivity issues — returns 503
• Payment not received or insufficient USDC — returns 402 payment required
• Rate limit exceeded — returns 429 too many requests